Car-truck.



No. 807,439. I PATENTED DEG. 19, 1905. J. R. GARDWELL.

CAR TRUCK.

APPLICATION FILED SEPT. 22, 1904.

2 SHEETS-SHEET l.

mlnn 72 Hmmmm Imfz''k'i 6im!liNIIHHHHIHIliIlHlum"MINIMUM"lllllllllllllmmmu"um j IIIIIIIIIIII?lNo. 807,439. PATENTED DEG. 19, 1905.

J. R. CARDWELL.

GAR TRUCK.

APPLIGATION FILED s519122, 1904.

2 SHEETS-SHEET z.

5 D@ www l o Q mnmnnunn I N n@ UNITED STATES Er orriois.

CAR-TRUCK.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application led September 22, 1904. Serial No. 225,419.l

To all when@ t may concern:

Be it known that 1, JAMES ROBERT CARD- w-ELL, acitizen of the UnitedStates, residing at Chicago, in the State of Illinois, have inventedcertain new and useful Improvements in Car-Trucks, of which thefollowing is a specification.

My invention relates to car trucks and particularly to the mounting ofthe truck bolster upon the frame which is supported upon the wheels. Theprincipal objects of the invention are, to provide for the introductionof the springs between the bolster and its supports in such a manner asto economize space and allow of the use of longer springs than ordinary,to provide for placing the springs entirely within the bolster, tocompact and simplify the bolster support and to generally improve theconstruction of car bolsters and trucks. These objects together withother advantages which will hereinafter appear I attain by means of thestructure illustrated in preferred form in the accompanying drawings,wherein- Figure 1 a partial side elevation vof a common diamond framewheel-truck and vertical section through the bolster and its supports,on line (l) in Figure 2, showing my improvements;

Figure 2 is a partial plan View and horizontal section taken along theline (2) in Figure 1;

Figures 3 and i are respectively a top plan View and aside elevation ofthe bolster in place in the truck frame.

' For illustration of my invention I have shown a bolster made ofI-beams and mounted in the common diamond frame. The bolster may becomposed of the two side-beams 5, placed in the diamond frame as shown,and transmitting the weight of the car indirectly to the spring plank 6,which receives the weight at the two ends upon bearing blocks 7 whichare provided with upright posts 8. work ing through openings in thebottom plate 9 of the bolster and directly engaging the floating springplate 10, which works within the bolster and receives the pressure ofcoil springs 11 upon which rests the bearing block 12, preferablyriveted directly to the iianges and web of the I-beams 5 forming thebolster as shown in Fig. 1.

The outer flanges of the bolster 5 are notched to engage the columnguides 13, so as to keep the bolster in place during the verticalvibration within the frame 14. The top spring plate 12 is ixed in place,but the lower one 10 is a iioating plate and is preferably guided invertical position by being provided with notches which engage guide lugs15 iixed to the web of the li-beam 5.

It will he seen that by this construction I have placed the springs 11entirely within the bolster and also within the diamond frame and thatthe pressure upon the springs being applied at the top of the bolsterinstead of at the bottom makes all the room within the diamond frameavailable for the springs except what is necessary to allow for the playbetween the bolster bottom plate 9 and the spring plank. The springs 11,the floating bearing plate 10, and all movable parts inclosed entirelywithin the bolster itself, and of course the posts 8 need be only longenough to allow for the necessary play of the bolster upon its springs.The bolster is securely guided within the column guides 13, which alsoform the struts of the wheel truss or frame, and the floating plate issecurely guided in its place within the bolster. There are no looseparts which may become disengaged from their places and the wholetruckis compact and is as rigid as is possible with the proper allowance ofthe vertical vibrations of the bolster with relation to the wheel frame.

Having thus described my invention and illustrated its use, whatI claimas new, and desire to secure by Letters Patent, is-

1. In a car truck a bolster composed of two I-beams and a set of springsconfined between the said I-beams, and means for transmitting thepressure upon the bolster through the springs to the wheel truss.

2. The combination with a bolster composed of two T-beams forming a box,springs within said box resting upon aiioating plate, all confined inthe box, and supporting posts extendingwithin the bolster and engagingsaid iioating plate, substantially as described.

3. The combination of a car bolster forming a closed box at the ends,springs and a supporting plate therefor in the box, apertures in thebase of the box, and a plate on the wheel truss having studs extendingthrough said apertures and engaging the floating plate.

In testimony whereof I have hereunder signed my name in the presence ofthe two subscribing witnesses.

JAMES ROBERT CARDWELL.

Witnesses:

E. C. PAGE, H. M. SIMoNs.

IOC

